Thermal Mass Flow Sensor - TESTO 6448 Instruction Manual

3.2.2.

Thermal mass flow sensor

The thermal mass flow sensor for the compressed air volume flow
measurement is independent of the process pressure and the me-
dia temperature.
Feature
Sensor
Media
Accuracy
Display, operation
Display units
Measurement
dynamics
Measuring range
(1:300)
Response time
Pressure-tight
Protection class
Media contact
Housing materials
Protection class
Electrical
connection
1
The measurement, display and adjustment ranges are related to the standard
volume flow according to DIN ISO 2533 (15 °C, 1013 mbar and 0 % rel. humidi-
ty) if not otherwise stated in the calibration protocol of the sensor
Values
Thermal, glass-coated ceramic sensor
Compressed air (CO
special calibration)
For compressed air quality classes
(ISO 8573: particles to humidity to oil) 1-4-1:
±3 % of reading, ±0.3 % of final value for
compressed air quality classes (ISO 8573:
particles to humidity to oil) 3-4-4: ±6 % of
reading, ±0,6 % of final value
Four-digit alphanumeric display, two operat-
ing buttons, operation menu, LEDs (6x green
for physical units, 2x yellow for switch status-
es)
1
m³/min, m³/h, m/s, m³, °C
1:150 or 1:300
0.25 to 75 Nm³/h
< 0.1 s
Up to 16 bar overpressure
IP65 / III
V2A (1.4301), glass-coated ceramic, PEEK,
polyester, Viton, anodised aluminium
PBT-GF 20, PC (APEC), Makrolon, V2A
(1.4301), Viton
IP65 / III
M12 x 1 connector, can be loaded to 250 mA,
short-circuit-proof
3 Specifications
, N also possible with
2 2
9